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Over heating the engine is a serious concern. With the hood raised you should hear the motorized fan turn on just behind the radiator as the engine requires additional cooling.. If you look in from the rear of the radiator you should see the fan blades.

This electric powered motor operates on a thermostat and when the engine temperature rises this fan should come on. I'm assuming from your description that when driving and air is flowing through the radiator as the car travels the engine is nor overheating.

If there is water in the radiator and the car overheats, then it means there might be some dirt or blockage in the radiator or condenser.

When the car is on the motion, air passes through the front and assists the fan to cool the engine. There are situation whereby air doesn't have free flow because of blockage in the radiator and condenser. Dust and debris can cause blockage. If this be the case, have your radiator washed thoroughly and cleaned.

If there is no water in the radiator when the car overheats, then there is a probably a leakage from the water pump. Or maybe your fan isn't blowing properly. The fan might be blowing weak air.

The above are what could cause your engine to over heat.

So start the check from the radiator. Poor water into the radiator, wait for some minutes, look under the car and observe if water is going to leak. If there is a leak, it might be from the water pump or a leaking hose.

If water from radiator has no leak, have your radiator washed and clean the condenser has they might block air that is suppose to cool the engine.

Also, make sure your fan is blowing properly or well enough to cool the engine.

Make sure you have the above checked thoroughly as they are the major causes of problems like this.

This overheating problem could lead to a burnt gasket and this can dry the engine oil which will eventually knock the engine. So have this problem fixed to prevent further damage that will cost you more money.

Lastly, remove the hose that connects the radiator to the engine, water from the engine will come out. Pour water into the radiator, the water will flow through the hose down to the ground. Do this severally. Now connect the hose back to the engine, pour water into the radiator. Start the engine, the water in the radiator will reduce, add more water till radiator is full.

In summary, the major cause of over heating problem is from the radiator, fan, water pump, blockage in the hose, and dirt in in/on the condenser. These are area you need to concentrate on.

I forgot to mention that the acceleration meter or engine meter on the dash board shouldn't be more the 5. It should be below 5. If it is above 5, it can cause overheating. I hope you understand what I mean.....

The air conditioning condenser creates a lot of heat when the a/c is on. The cooling fan is supposed to run the whole time the a/c is on to keep it cool. If the fan isn't on, the radiator will absorb this heat and cause your car to over heat. You should also check your coolant level. So, it sounds to me like your cooling fan isn't working.

Normal, the ac heat exchanger condenser need air moving across the fins to remove the heat. While
moving in town the condenser isn't remove the meat that is building up the it's
aluminum fins. Even though the vehicle uses an electric fan. The fan is used to
cool the engine temperature. If you Toyota is equip-ed with automatic
transmission. The electric fan will need to pull enough air to cool the engine
temperature, automatic transmission fluid, air conditioner condenser, and maybe
power steering condenser to cool the power steering fluid. Later model of
vehicles/trucks are using different refrigerants instead R134A in which you
Toyota uses.

The simples way to explain is the ac remove heat from inside your Toyota and this heat is removed by the refrigerants inside your ac in the car. To cool the refrigerant this coolant is removed to the heat exchanger condenser located in front of the engine radiator. So, while moving at 60mph there is enough air flow through the radiator, ac head condenser, and other aluminum heat exchangers. GB...stewbison

Although the 4 cylinder is too underpowered to have air conditioning in my opinion, it still shouldn't overheat within 10 minutes unless something is wrong. If your Jeep doesn' not overheat when you are driving WITHOUT AC on then your compressor might have a problem and causing the engine to work too hard to turn it.

But if it overheats without the AC on, then the first thing you need to do is check the cooling fan and see if it operates! There has been a lot of problems with the cooling fan relay on this model. If that isn't it, then move to changing the thermostat and checking the water pump.

If your vehical is over heating at idea it is most likely the radiator fanthis can be checked by running the car until it heats up and looking at the fan to see if it is running.This usually isn't an issue as long as you are driving, but when you stop or driving slow or in traffic it will start heating up quickly. your fan keeps air flow going through the engine while at a stop to help cool down the engine compartment and pull.push air through the radiator

If you still over heat no matter if your driving or stopped it may be a thermostatic radiator valve that went bad. this is a release valve between the radiator and the engine that helps control the coolent flow between the engine and radiator and control how much heat is taken out of the engine to be cooled in the radiator.

So, run the car and see if the radiator fan kicks on. if it does, it's probably not a bad fan. if your car starts over heating and the fan never comes on it's most likely some problem with the fan

if it is turning and you are still having problems overheating go buy a new valve and change it out. cost you at most 5 bucks for a new one (probably less)

the 1st thing i would have checked is the thermostat, and the radiator hoses, if these check out ok, then , i would check to make sure that the electric fan is kicking on in order to cool the engine down, if it isn't kicking on, then i would check the fan relays , located under the hood, on the drivers side, inside of a plastic box, inside of the cover to the box, is a diagrahm, showing you what each fuse and relay are for.

Test thermostat in a jug and pour boiling water on it , it should compress meaning it works. Check that the waterpunp is operating pushing water into the engine .Check that radiator water flows to the watrpump. Is tension of fanbelt of waterpump sufficient that it doenst slip. Lastly check that the radiator fan is working if has a electric fan. if this doesn’t help check if radiator or engine water passages isn’t blocked.